QmlDesigner: Change spacing of items

Change-Id: I1000019c720027c5fd9565582c78e7a7afa2fe25
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>
QmlDesigner: Discriminate between painted and size bounding rectangle

Change-Id: Ic465e472c13570a1da0dee047c5810c50f7a4492
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>